• Title/Summary/Keyword: Styrofoam Box

Search Result 17, Processing Time 0.202 seconds

Development of Hydroponic Technique of Fruit Vegetables Using Perlite and Mixtures with Perlite as a Substrate I. Effects of Containers and Substrates on the Growth and Fruit Quality of Hydroponically Grown Cucumber (Perlite 단용 및 혼용처리를 이용한 과채류 양액재배 기술 개발 I. 재배용기와 배지의 종류가 양액재배 오이의 생장과 과실품질에 미치는 영향)

  • 정순주;서범석;강종구;김홍기
    • Journal of Bio-Environment Control
    • /
    • v.4 no.2
    • /
    • pp.159-166
    • /
    • 1995
  • This experiment was aimed to investigate the growth and yield responses of hydroponically grown cucumber as affected by cultural containers and substrates using perlite and mixtures with perlite. Containers used in this experiment were bed and box made of styrofoam, PE film and Wagner pot and substrates used were perlite, peatmoss, rice hull and carbonized rice hull. The results obtained were as follows : Based on the growth and yield responses determined from the leaf area and total fruit weight, bed and box made of styrofoam was considered the best containers among tested for cucumber hydroponics. Recommendable substrates for hydroponically grown cucumber using perlite were evaluated in the order of perlite, perlite with rice hull and perlite with carbonized rice hull in styrofoam bed and box. Increase in marketable yield and decrease in abnormal fruits was observed in the mixed substrates with rice hull or carbonized rice hull when compared to perlite single media.

  • PDF

The Use of Styrofoam Box for Chikso (Korean Brindled Cattle) Semen Cryopreservation with Liquid Nitrogen (칡소 동결 정액 생산을 위한 스티로폼상자와 액체질소 이용 방법)

  • Kim, Sung Woo;Ko, Yeoung-Gyu;Lee, Jae-Yeong;Kim, Chan-Lan;Hwang, In-Sul
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.21 no.4
    • /
    • pp.490-496
    • /
    • 2020
  • A styrofoam box is used as a simple and easy freezing method to preserve animal semen as a livestock genetic source. This study optimized the methods of freezing chikso brindled cattle semen. To test the freezing box, the motility of spermatozoa was compared between two box sizes (length×width×heigh) with the dimensions of 23.5×30.5×22.5 cm and 25.5×46.5×26.5 cm. The motility of thawed sperm from brindled Korean bulls was used to confirm the efficiency of the freezing boxes. The box having a larger inner space with larger horizontal and height measurements supported better motility after thawing (60.4±5.3% vs 67.2±3.1%) with 10 min of exposure time in liquid nitrogen vapor. The optimized freezing space is estimated to be an essential element for successful freezing results and the larger box could be used for production of more than 60 frozen semen straws. These properties are also helpful to optimize the cryopreservation techniques that would control the quality and quantity of semen straws according to different animal species.

Effects of $CO_2$ Absorbent in the PE Film Bag and Styrofoam Box during the Ginger Storage (PE 필름과 스치로폴 상자를 이용한 생강저장시 탄산가스 흡착제의 효과)

  • 최윤희;김명숙
    • Korean Journal of Food Preservation
    • /
    • v.8 no.3
    • /
    • pp.286-290
    • /
    • 2001
  • Ginger was stored in the 0.05mm and 0.08mm of PE film bags and the styrofoam box. During the ginger storage, weight losses in the PE film bags were effectively supressed than in the control bag, and storage was better in the 0.08mm PE film bag while the spoilage of ginger was higher than in 0.05mm bag. The effective storage temperature was 10$^{\circ}C$ at which was no scouting during the storage. And the perforation in the PE film bag helped the healthy ginger ratio. Single perforation of 6an diameter was good for 0.05mm film and three for 0.08mm film. When CO$_2$absorbent was added into the film bag, the spoilage and mold occurence was lowered. In the styrofoam box, the healthy ginger ratio also increased by incorporating the absorbents, but there were no great differences between activated charcoal and calcium hydroxide.

  • PDF

Development of High-insulation Packaging using Recycled PET and Comparison of Insulation Performance with Existing Styrofoam and Paper Boxes (재생페트를 이용한 고단열 패키징 개발과 기존의 스티로폼 및 종이 박스와의 단열성능 비교)

  • Ryu, Jae Ryong;Yook, Se Won;Kal, Seung Hoon;Shin, YangJae
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
    • /
    • v.25 no.3
    • /
    • pp.111-116
    • /
    • 2019
  • Thermal insulation performance of new insulation packaging made of recycled PET nonwoven (thickness : 10 mm) was verified by conducting comparative experiment with an EPS box (thickness : 25 mm) and a double wall corrugated box (thickness : 7 mm). Three ice packs (300 g) were positioned 200 mm above the bottom inside each box, all of which are placed side by side and temperature change of 2 points (5mm under middle icepack and 130 mm under middle icepack) was recorded by data logger (GL-840, Graphtec) for 16 hours under the environment of 29℃. The new packaging box showed 75% higher insulation performance than the EPS box and 180% higher than the corrugated box. In order to figure out the reason for insulation performance difference among boxes, thermal conductivities of each box material were measured using heat flow meter (HFM436 lamda, Netzsch). U-value (thermal conductivity divided by thickness) of EPS was lower than recycled pet nonwoven by 57%, which seemed to be opposite to the result of insulation test of boxes. This was explained by high water vapor transmission rate of EPS (6 times higher than PET insulation) and air pocket effect of PET insulation.

Effect of Temperatures and Fillers on Yield and Quality of Turmeric (Curcuma longa L.) During Postharvest Seed Rhizome Storage (종근 저장 온도 및 충진제가 강황 수량 및 품질에 미치는 영향)

  • Lim, Jung Dae;Kim, Eun Hye;Yun, Jae Yeon;Park, Hae Il;Shim, Hun Sub;Choi, Ri Na;Yang, Yae Sul;Park, Chung Bum;Ahn, Young Sup;Chung, Ill Min
    • Korean Journal of Medicinal Crop Science
    • /
    • v.21 no.5
    • /
    • pp.334-341
    • /
    • 2013
  • Studies were carried to evaluated the influence of storage method by temperatures and fillers on yield and quality of seed rhizome in turmeric. Seed rhizome was stored at styrofoam box filled with rice hull and sand (3:1) or vermiculite for 30, 60 and 90 days at different temperatures (5, 10 and $15^{\circ}C$. compared to traditional method (rhizome only). Parameters were obtained for weight loss, cold injury, percentage of decayed in stored rhizome during storage periods. Also, the germination, growth pattern and yield from stored rhizome has been investigated. It was confirmed that storage of turmeric in stored with filled with vermiculite helps in prevention of rhizomes from microbial and fungal attack. The storage of rhizomes in styrofoam box without any filler at low temperature below $10^{\circ}C$. is not advocated due to heavy losses weight and decayed in management of postharvest for turmeric rhizome. Germination percentage, growth pattern and yield was maximum for rhizomes stored at styrofoam box filled with vermiculite for 90 days at $15^{\circ}C$. The paper outlines a brief attempt to assess the efficacy of non-chemical methods including optimal storage method (temperature and filler) of control of decay and moisture losses during storage of turmeric.

Effects of Storage Methods on the Rhizome Quality of Rehmannia glutinosa L. (저장방법이 지황 종근 품질에 미치는 영향)

  • 김인재;김민자;남상영;이철희;김홍식
    • Korean Journal of Food Preservation
    • /
    • v.11 no.2
    • /
    • pp.282-285
    • /
    • 2004
  • This experiment was carried out to investigate the cost reduction of rhizome through the stable storage of Jiwhang #1(Rehmannia glutinosa Libosch). The growth characteristics of Jiwhang #1 are different from those of local Rehmannia glutinosa L. varieties in Korea. Various storage methods was introduced and analyzed for 120 days. Among storage methods, changes in mean daily temperature in storage location were the least from 7.2 to 13.8$^{\circ}C$ in underground storage, while those were wide in styrofoam box filled with soil, and changes in mean daily relative humidity were the highest 98.2% in underground storage. As the storage period increased, the rhizome brix and the rate of rhizome loss and spoiled rhizome increased. The brix and loss rate of rhizome were higher in net sack filled with hull and styrofoam box filled with hull, but the rate of spoiled rhizome was the greatest in underground storage among storage methods. As the storage period increased, the hardness of rhizome epidermis increased, while that of rhizome endodermis decreased.

Thermal Insulation Performance of Composite Waterproofing Method of Thermal Supplement Type (단열 보완형 복합방수공법의 단열성능에 관한 연구)

  • Choi, Sung-Min
    • Journal of the Korea institute for structural maintenance and inspection
    • /
    • v.18 no.4
    • /
    • pp.59-66
    • /
    • 2014
  • Insulation of rooftop is one of the major performance to energy-saving construction. Further, waterproofing performance is also important. For such a reason, it is need to develop waterproofing method containing thermal insulation property. This study was wanted to evaluate thermal insulation performance about the composite waterproofing method of thermal supplement type that is developed recently. As a result of waterproofing performance test, every test item was showed over the performance standards of KS (Korean (Industrial) Standards). And the result of thermal insulation performance test, the highest temperature in the styrofoam box was $25.91^{\circ}C$, the bubble sheet box was $17.28^{\circ}C$, the insulation sheet box was $15.47^{\circ}C$ and the waterproofing sheet box of thermal supplement type was $24.11^{\circ}C$. In observations of thermal bridges of sheet's joint, thermal bridges was not identified at the sheet's joint. As a result, composite waterproofing method of thermal supplement type is interpreted to have thermal insulation performance.

Sand-Box Evaluation for Vibration-Attenuation of Concrete Panels with Recycled Materials (재활용재 혼입콘크리트 패널의 진동감쇠성에 대한 사조실험)

  • 정영수;최우성;조성호
    • Magazine of the Korea Concrete Institute
    • /
    • v.10 no.4
    • /
    • pp.171-182
    • /
    • 1998
  • Vibration-controlled concrete has been developed by using various concrete mixtures, such as latex, rubber powders, plastic resins and polystyrene(styrofoam). As part of the recycling research of obsolete aged tires and plastic materials, various vibration-reducing mixtures are used for 10 concrete panels having above 200 kg/cm$^2$ in uniaxial compressive strength. Plywood box with sand uniformly saturated by the raining device has been used for the analysis of the impact wave, of which data have been transfered by the FFT technique to comparatively investigate damping ratios of 10 concrete panels.According to wave propagation analysis on vibration-controlled concrete for this research, it can be concluded that Latex concrete has relatively larger damping ratios than those for noncontrolled normal concrete in a similar compressive strength

Changes in Internal and External Temperature and Microbiological Contamination depending on Consumer Behavior after Purchase of Fresh-Cut Produces (대형마트 신선편의식품 소비자의 구매 후 행동에 따른 식품 내·외부 온도 및 미생물학적 오염 변화)

  • Park, Hyun-Jin;Lee, Jeong-Eun;Kim, Sol-A;Shim, Won-Bo
    • Journal of Food Hygiene and Safety
    • /
    • v.35 no.5
    • /
    • pp.459-467
    • /
    • 2020
  • In this study, we investigated the changes in both ambient temperature and microbial contamination of fresh convenience foods (FCFs) caused by the behavior of consumers after purchase. According to consumer survey results, it took 0.5 to 3 h put the purchased FCF in a home refrigerator or consume it. Only aerobic bacteria and Staphylococcus aureus (below maximum permitted limit) were detected in FCFs obtained from a local market. During storage of FCFs in a vehicle trunk for up to 3 h. the external and internal temperatures of FCFs were found to be 19 and 18.5℃ in spring, 44 and 42℃ in summer, 31.3 and 29.2℃ in autumn, and 17.6 and 16.8℃ in winter, respectively. Changes in contamination levels of aerobic bacteria on FCFs stored in a vehicle trunk for up to 3 hours are as follows: 2.72 → 3.41 log CFU/g in spring, 3.11 → 4.32 log CFU/g in summer, 3.08 → 3.81 log CFU/g in autumn, 2.71 → 3.36 log CFU/g in winter. S. aureus exceeding the tolerance was detected even when the FCFs were stored in a vehicle trunk for 1 h in summer and autumn and 2 h in spring and winter. Among three boxes (corrugated box, styrofoam box, and corrugated box coated with an aluminum film), the styrofoam box maintained the lowest temperature and showed the lowest growth rate of microorganisms on FCF after storage for 3 h in the vehicle trunk depending on whether ice was added. These results indicated that the possibility of food poisoning occurs when FCFs are exposed to the external environment. It is necessary to provide guidelines regarding storage temperature and allowable time for safe consumption of FCFs after purchase.

Monitoring of Chilled Fish Quality by Using Time-Temperature Integrator (TTI): Application at a Mock Store (시간-온도이력 지시계(TTI)에 의한 냉장 생선의 품질 모니터링: 모의상점에 적용)

  • Park, Soo Yeon;Kang, Jin Won;Choi, Jung Hwa;Kim, Min Jung;Lee, Man Hi;Jung, Seung Won;Lee, Seung Ju
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
    • /
    • v.20 no.3
    • /
    • pp.91-96
    • /
    • 2014
  • TTI was applied to monitor the quality changes of fish displayed at a mock store. Chilled fishes were displayed with TTI on a styrofoam box filled with crushed ice. The ice was periodically refilled to maintain the fish freshness. The color of TTI and the qualities of mackerel and Alaska pollack were measured during displaying. VBN and Pseudomonas spp. were used as the quality factors of mackerel and Pollack, respectively. The spoilage time was regarded as when the factors reached their critical levels. The fishes were spoiled when the color of TTI reached an end-point. It was therefore found out that it is possible to predict the fish spoilage by observing the TTI color change.

  • PDF